#define _CRT_SECURE_NO_WARNINGS  1
#include<stdio.h>
#include<string.h>
size_t my_strlen(char* p)
{
	size_t count = 0;
	while (*p != '\0')
	{
		 count++;
		p++;
	}
	return count;
}

int main()
{
	char arr[] = "abcdef";
	size_t len = my_strlen(arr);
	printf("%zd\n", len);
	return 0;
}